Description
The alarm_timer_nsleep function in kernel/time/alarmtimer.c in the Linux kernel through 4.17.3 has an integer overflow via a large relative timeout because ktime_add_safe is not used.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | linux | 4.18.20-1 | — |
| Debian 13 | linux | 4.18.20-1 | — |
| Debian 12 | linux | 4.18.20-1 | — |
| Debian 8 | linux | 3.16.64-1 | DLA-1731-1 |
| Debian 8 | linux-4.9 | 4.9.144-3.1~deb8u1 | DLA-1715-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.04 LTS | linux-vmware | No fix yet | — |
| Ubuntu 24.04 LTS | linux-raspi-realtime | No fix yet | — |
| Ubuntu 22.04 LTS | linux-riscv +2 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-gke +3 | No fix yet | — |
| Ubuntu 18.04 LTS | linux | 4.15.0-58.64 | USN-4094-1 |
| Ubuntu 18.04 LTS | linux-aws | 4.15.0-1047.49 | USN-4118-1 |
| Ubuntu 18.04 LTS | linux-azure | 4.18.0-1011.11~18.04.1 | — |
| Ubuntu 18.04 LTS | linux-gcp +1 | 4.15.0-1040.42 | USN-4094-1 |
| Ubuntu 18.04 LTS | linux-kvm | 4.15.0-1042.42 | USN-4094-1 |
| Ubuntu 18.04 LTS | linux-oem | 4.15.0-1050.57 | USN-4094-1 |
| Ubuntu 18.04 LTS | linux-oracle | 4.15.0-1021.23 | USN-4094-1 |
| Ubuntu 18.04 LTS | linux-raspi2 | 4.15.0-1043.46 | USN-4094-1 |
| Ubuntu 18.04 LTS | linux-snapdragon | 4.15.0-1060.66 | USN-4094-1 |
Show 6 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | linux | 4.4.0-139.165 | USN-3821-1 |
| Ubuntu 16.04 LTS | linux-aws | 4.4.0-1072.82 | USN-3821-1 |
| Ubuntu 16.04 LTS | linux-aws-hwe | 4.15.0-1047.49~16.04.1 | USN-4118-1 |
| Ubuntu 16.04 LTS | linux-azure | 4.15.0-1055.60 | USN-4094-1 |
| Ubuntu 16.04 LTS | linux-gcp | 4.15.0-1040.42~16.04.1 | USN-4094-1 |
| Ubuntu 16.04 LTS | linux-hwe | 4.15.0-58.64~16.04.1 | USN-4094-1 |
| Ubuntu 16.04 LTS | linux-kvm | 4.4.0-1037.43 | USN-3821-1 |
| Ubuntu 16.04 LTS | linux-oracle | 4.15.0-1021.23~16.04.1 | USN-4094-1 |
| Ubuntu 16.04 LTS | linux-raspi2 | 4.4.0-1100.108 | USN-3821-1 |
| Ubuntu 16.04 LTS | linux-snapdragon | 4.4.0-1104.109 | USN-3821-1 |
| Ubuntu 14.04 LTS | linux-aws | 4.4.0-1034.37 | USN-3821-2 |
| Ubuntu 14.04 LTS | linux-lts-xenial | 4.4.0-139.165~14.04.1 | USN-3821-2 |
| Ubuntu Pro FIPS 18.04 LTS | linux-aws-fips +2 | No fix yet | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-aws-fips | 4.15.0-2018.18 | — |
| Ubuntu Pro FIPS-updates 18.04 LTS | linux-azure-fips | 4.15.0-2006.7 | — |
| Ubuntu Pro FIPS-updates 16.04 LTS | linux-fips | 4.4.0-1008.10 | — |
| Ubuntu Pro 14.04 LTS | linux | No fix yet | — |
| Ubuntu Pro 14.04 LTS | linux-azure | 4.15.0-1059.64~14.04.1 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | kernel-alt +1 | 4.14.0-115.7.1.el7a | RHSA-2019:0831 |
| RHEL 7 | kernel-rt +10 | 3.10.0-1062.rt56.1022.el7 | RHSA-2019:2043 |
| RHEL 7 | perf +18 | 3.10.0-1062.el7 | RHSA-2019:2029, RHSA-2019:0831 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 | kernel-azure +2 | 4.12.14-5.8.1 | SUSE-SU-2018:2222-1 |
| SLES 15 | kernel-docs +6 | 4.12.14-25.3.1 | SUSE-SU-2018:2092-1 |
| SLES 12 SP3 | kernel-docs +4 | 4.4.140-94.42.1 | SUSE-SU-2018:2051-1 |
| SLES 12 SP2 | kernel-syms +2 | 4.4.121-92.92.1 | SUSE-SU-2018:2344-2, SUSE-SU-2018:2344-1 |
| SLES 12 SP2 | kgraft-patch-SLE12-SP2_Update_24 | 1-3.7.1 | SUSE-SU-2018:2344-2, SUSE-SU-2018:2344-1 |
| SLES 12 SP2 | lttng-modules | 2.7.1-9.4.1 | SUSE-SU-2018:2344-2, SUSE-SU-2018:2344-1 |
| SLES 12 SP1 | kernel-xen +3 | 3.12.74-60.64.99.1 | SUSE-SU-2018:2384-1 |
| SLES 12 SP1 | kgraft-patch-SLE12-SP1_Update_30 | 1-2.3.1 | SUSE-SU-2018:2384-1 |
| SLES 12 SP1 | lttng-modules | 2.7.0-4.2.1 | SUSE-SU-2018:2384-1 |
| SLES 12 | kernel-ec2 +4 | 3.12.61-52.141.1 | SUSE-SU-2018:2384-1, SUSE-SU-2018:2362-1 |
| SLES 12 | kgraft-patch-SLE12_Update_37 | 1-1.5.1 | SUSE-SU-2018:2362-1 |
| SLES 12 | lttng-modules | 2.4.1-16.6.1 | SUSE-SU-2018:2362-1 |
Show 13 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 11 SP4 | kernel-ec2 +9 | 3.0.101-108.68.1 | SUSE-SU-2018:2332-1 |
| SLES 11 SP3 | kernel-ec2 +7 | 3.0.101-0.47.106.43.1 | SUSE-SU-2018:2366-1 |
| SLES for SAP 12 SP3 | kernel-syms +2 | 4.4.140-94.42.1 | SUSE-SU-2018:2051-1 |
| SLES for SAP 12 SP2 | kernel-syms +2 | 4.4.121-92.92.1 | SUSE-SU-2018:2344-1 |
| SLES for SAP 12 SP2 | kgraft-patch-SLE12-SP2_Update_24 | 1-3.7.1 | SUSE-SU-2018:2344-1 |
| SLES for SAP 12 SP2 | lttng-modules | 2.7.1-9.4.1 | SUSE-SU-2018:2344-1 |
| SLES for SAP 12 SP1 | kernel-xen +3 | 3.12.74-60.64.99.1 | SUSE-SU-2018:2384-1 |
| SLES for SAP 12 SP1 | kgraft-patch-SLE12-SP1_Update_30 | 1-2.3.1 | SUSE-SU-2018:2384-1 |
| SLES for SAP 12 SP1 | lttng-modules | 2.7.0-4.2.1 | SUSE-SU-2018:2384-1 |
| SLES for SAP 11 SP4 | kernel-ec2 +8 | 3.0.101-108.68.1 | SUSE-SU-2018:2332-1 |
| SLE Real Time 12 SP3 | kernel-rt +3 | 4.4.139-3.17.1 | SUSE-SU-2018:2150-1 |
| SLE Real Time 11 SP4 | kernel-rt +3 | 3.0.101.rt130-69.33.1 | SUSE-SU-2018:2637-1 |
| SLE Live Patching 15 | kernel-default | 4.12.14-25.3.1 | SUSE-SU-2018:2092-1 |
| SLE Live Patching 15 | kernel-livepatch-SLE15_Update_1 | 1-1.3.1 | SUSE-SU-2018:2092-1 |
| SLE Live Patching 12 SP3 | kgraft-patch-SLE12-SP3_Update_15 | 1-4.3.1 | SUSE-SU-2018:2051-1 |
| SUSE OpenStack Cloud 7 | kernel-syms +2 | 4.4.121-92.92.1 | SUSE-SU-2018:2344-1 |
| SUSE OpenStack Cloud 7 | kgraft-patch-SLE12-SP2_Update_24 | 1-3.7.1 | SUSE-SU-2018:2344-1 |
| SUSE OpenStack Cloud 7 | lttng-modules | 2.7.1-9.4.1 | SUSE-SU-2018:2344-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | kernel-ec2 +6 | 3.0.101-0.47.106.43.1 | SUSE-SU-2018:2366-1 |
| SUSE Enterprise Storage 4 | kernel-syms +2 | 4.4.121-92.92.1 | SUSE-SU-2018:2344-1 |
| SUSE Enterprise Storage 4 | kgraft-patch-SLE12-SP2_Update_24 | 1-3.7.1 | SUSE-SU-2018:2344-1 |
| SUSE Enterprise Storage 4 | lttng-modules | 2.7.1-9.4.1 | SUSE-SU-2018:2344-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | kernel-source | 5.14.6-1.4 | openSUSE-SU-2024:13704-1, openSUSE-SU-2024:10728-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | dtrace-modules-3.8.13-118.31.1.el6uek | 0.4.5-3.el6 | ELSA-2019-4576 |
| Oracle Linux 7 | dtrace-modules-3.8.13-118.31.1.el7uek | 0.4.5-3.el7 | ELSA-2019-4576 |
| Oracle Linux 7 | kernel-uek +5 | 3.8.13-118.31.1.el7uek | ELSA-2019-4576, ELSA-2019-4541 |
| Oracle Linux 7 | kernel-uek-tools +3 | 4.14.35-1844.2.5.el7uek | ELSA-2019-4541 |
| Oracle Linux 7 | perf +12 | 3.10.0-1062.el7 | ELSA-2019-4541, ELSA-2019-2029 |
Advisories 25
- USN-4094-1 linux, linux-hwe, linux-azure, linux-gcp, linux-gke-4.15, linux-kvm, linux-oem, linux-oracle, linux-raspi2, linux-snapdragon vulnerabilities Ubuntu Security Notices (USN) · Sep 7, 2026
- USN-4118-1 linux-aws vulnerabilities Ubuntu Security Notices (USN) · Sep 7, 2026
- RHSA-2019:2043 Red Hat Security Advisory: kernel-rt security and bug fix update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- RHSA-2019:2029 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- RHSA-2019:0831 Red Hat Security Advisory: kernel-alt security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- USN-3821-2 linux-lts-xenial, linux-aws vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- USN-3821-1 linux, linux-aws, linux-kvm, linux-raspi2, linux-snapdragon vulnerabilities Ubuntu Security Notices (USN) · Jun 3, 2026
- DLA-1731-1 linux - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1715-1 linux-4.9 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:13704-1 kernel-devel-longterm-6.6.17-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:2092-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:2344-2 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:2366-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:2362-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:2222-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:2051-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:2332-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:2384-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:2344-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10728-1 kernel-devel-5.14.6-1.4 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:2150-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:2637-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · May 2, 2025
- ELSA-2019-2029 Important: kernel security, bug fix, and enhancement update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Aug 13, 2019
- ELSA-2019-4576 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Mar 12, 2019
- ELSA-2019-4541 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Feb 12, 2019
References
- USN-3821-1 vendor-advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=5f936e19cc0ef97dbe3a56e9498922ad5ba1edef
- https://bugzilla.kernel.org/show_bug.cgi?id=200303
- USN-3821-2 vendor-advisory
- [debian-lts-announce] 20190315 [SECURITY] [DLA 1715-1] linux-4.9 security update mailing-list
- 104671 vdb-entry
- [debian-lts-announce] 20190327 [SECURITY] [DLA 1731-1] linux security update mailing-list
- [debian-lts-announce] 20190401 [SECURITY] [DLA 1731-2] linux regression update mailing-list
- RHSA-2019:0831 vendor-advisory
- RHSA-2019:2043 vendor-advisory
- RHSA-2019:2029 vendor-advisory
- USN-4094-1 vendor-advisory
- USN-4118-1 vendor-advisory